This is definitely a great lecture for developers with a certain level of experience. In particular, the query tuning covered right from the beginning was a huge help. I thought I had sufficient knowledge about indexing, but I was deeply impressed by how a very simple tuning in a paging query could lead to such a drastic change in performance.

It was an informative lecture. Thank you.

By pointing out and explaining in detail the parts that felt overwhelming, I was able to make everything my own in a short amount of time! Not only was the code quality of the lecture excellent, but it was also a truly meaningful experience because I could learn good development habits by watching you always write test codes. Thank you!!!

There are various optimization techniques!! It's suitable as an intermediate-level course~

This seems to be the course closest to real-world practice. I recommend it if you are considering development as a career. However, for large-scale systems, monitoring should be included as a fundamental component, and it is a bit disappointing that this part is missing. If you plan to provide a lecture on that in the future, I will take it then and leave another review. Thank you.

I enjoyed the lecture while thinking, "What would I do in this situation?" It is a lecture that can guide you if you have never worked on a large-scale system before. If you have experience, it is a lecture where you can experience different perspectives and realize, "It can be done this way too." I think it would feel even more realistic if we could experience the service actually running by generating virtual traffic.

The lecture was easy to understand because it used a simple message board as an example, and it was a great opportunity to take a step further in understanding architecture.

It was great to be able to consider various strategies using Redis and Kafka in an MSA architecture.

There's a lot to learn from the lectures. Each chapter has keywords to study, and it's great that you focus on those and include code writing as well. The current popular post - the 36-minute lecture on Consumer implementation was a bit difficult to get through, so it would be good if you could upload the lectures divided into smaller segments. Just improving this part would make it much better. Students can divide it up themselves when listening, but it would be more appropriate to have it organized as separate lectures.

I was able to learn the essential core concepts about caching in a concise and efficient way. As you applied each caching method step by step, you introduced the problems with each approach along with alternative caching methods that could solve them, which greatly helped me understand things progressively. The lecture was so engaging that I ended up purchasing your bulletin board course as well haha Looking forward to many more great lectures from you!